Results 161 to 170 of about 89,960 (192)

Integer Ambiguity Estimation with the Lambda Method

1996
High precision relative GPS positioning is based on the very precise carrier phase measurements. In order to achieve high precision results within a short observation time span, the integer nature of the GPS double difference ambiguities has to be exploited.
Paul de Jonge, Christian Tiberius
openaire   +1 more source

GNSS integer ambiguity validation based on posterior probability

Journal of Geodesy, 2015
GNSS integer ambiguity validation is considered to be a challenge task for decades. Several kinds of validation tests are developed and widely used in these years, but theoretical basis is their weakness. Ambiguity validation theoretically is an issue of hypothesis test.
Zemin Wu, Shaofeng Bian
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Integer ambiguity resolution in GPS using particle filtering

Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148), 2001
Using carrier phase measurements enables the differential GPS to reach centimeter level accuracy. A phase lock loop cannot measure the full cycle part of the carrier phase. This unmeasured part is called integer ambiguity that requires to be resolved through other means. In this paper we present a new integer ambiguity resolution method. In this method
B. Azimi-Sadjadi, P.S. Krishnaprasad
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GNSS Integer Ambiguity Validation Procedures: Sensitivity Analysis

2014
Global Navigation Satellite Systems (GNSS) have been widely used for many precise positioning and navigation applications. In satellite-based precise positioning, as carrier phase measurements are used, the determination of correct integer carrier phase ambiguities is a key issue in obtaining accurate and reliable positioning results.
J. Wang, T. Li
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Improved Integer Ambiguity Resolution Technique for Fixed Arrays

Journal of Guidance, Control, and Dynamics, 2005
A method for quickly and accurately determining the integer ambiguities associated with carrier phase measurements on a rigid antenna array is presented. Residuals generated from the difference between the global positioning system measurements and the hypothesized value have been used in the multiple-hypothesis Wald sequential probability test (MHWSPT)
Jonathan D. Wolfe, Jason L. Speyer
openaire   +1 more source

Resolution of Integer Ambiguity in GPS Attitude Determination

2011 First International Conference on Instrumentation, Measurement, Computer, Communication and Control, 2011
In order to resolve the carrier phase ambiguity in attitude determination, a new approach is proposed and discussed. A method for static baseline vector estimation is derivate based on the epoch-difference carrier phase and a receiver clock bias model. By using the estimated baseline vector, a float solution of ambiguity is computed.
Chuang Liu, Pei Chen
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The GNSS integer ambiguities: estimation and validation

2005
The principle of positioning with the Global Positioning System (GPS) is based on determining the distance of at least four GPS satellites to a receiver. For that purpose the so-called code measurements can be used, so that the position of the receiver can be determined up to several meters. In order to allow for navigation with centimeter accuracy, it
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Fast integer ambiguity resolution for GPS attitude determination

Guidance, Navigation, and Control Conference and Exhibit, 1999
In this paper, a new algorithm for GPS (Global Positioning System) integer ambiguity resolution is shown. The algorithm first incorporates an instantaneous (static) integer search to significantly reduce the search space using a geometric inequality.
E. Lightsey, John Crassidis, F. Markley
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Integer ambiguity validation in high accuracy GNSS positioning

GPS Solutions, 2015
Carrier phase observations are required for high-accuracy positioning with Global Navigation Satellite Systems. This requires that the correct number of whole carrier cycles in each observation (integer ambiguity) is determined. The existing methods have been shown to perform differently depending on the observables.
Shaojun Feng, Altti Jokinen
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Hypothesis Testing for Resolving Integer Ambiguity in GPS

Navigation, 2003
: This paper presents statistical techniques for validating integer ambiguities and detecting cycle slips. The multiple-hypothesis Wald sequential probability ratio test (SPRT) validates the choice of initial integer ambiguities by finding the conditional probability that each set of integer biases under consideration is the true bias condition.
JONATHAN D. WOLFE, WALTON R. WILLIAMSON, JASON L. SPEYER   +2 more
openaire   +1 more source